<template>
	<view class="cart-container" v-if="cart.length !== 0">
		
		
		<!-- 收货地址区域 -->
		<my-address></my-address>
		<!-- 两者间边框线 -->
		<image src="../../static/cart_border@2x.png" class="address-border"></image>
		<!-- 商品列表的标题区域 -->
		<view class="cart-title">
			<!-- 左侧图标 -->
			<uni-icons type="shop" size="18"></uni-icons>
			<!-- 右侧文本 -->
			<view class="cart-title-text">购物车</view>
		</view>
		<!-- 循环渲染购物车中的商品信息 -->
		<!-- 加入左滑删除效果 uni-swipe-action 是最外层包裹性质的容器 --> 
		<uni-swipe-action>
		  <block v-for="(goods, i) in cart" :key="i">
		    <!-- uni-swipe-action-item 可以为其子节点提供滑动操作的效果。需要通过 options 属性来指定操作按钮的配置信息 -->
		    <uni-swipe-action-item :right-options="options" @click="swipeActionClickHandler(goods)">
		      <my-goods :goods="goods" :show-radio="true" :show-num="true" @radio-change="radioChangeHandler" @num-change="numberChangeHandler"></my-goods>
		    </uni-swipe-action-item>
		  </block>
		</uni-swipe-action>
		<!-- 结算区域 -->
		<my-settle></my-settle>
	</view>
	
	
	<!-- 空白购物车的区域 -->
	<view class="empty-cart" v-else> 
		<image src="../../static/cart_empty@2x.png" class="empty-img"></image>
		<text class="tip-text">空空如也~</text>
	</view>
</template>

<script>
// 导入自己封装的 mixin 模块
import badgeMix from '@/mixins/tabbar-badge.js'
import{ mapState, mapMutations } from 'vuex'

export default {
  // 将 badgeMix 混入到当前的页面中进行使用
	mixins: [badgeMix],
	
	computed: {
		...mapState('m_cart',['cart'])
	},
	data() {
		return {
			options: [{
				text: '删除',
				style: {
					backgroundColor: "#c00000"
				}
			}]
		};
	},
	methods: {
		...mapMutations('m_cart', ['updateGoodsState', 'updateGoodsCount', 'removeGoodsById']),
	  // 商品的勾选状态发生了变化
	  radioChangeHandler(e) {
	    this.updateGoodsState(e) // 输出得到的数据 -> {goods_id: 395, goods_state: false}
	  },
	  numberChangeHandler(e) {
		this.updateGoodsCount(e)
	  },
	  // 点击了滑动操作按钮
	  swipeActionClickHandler(goods) {
	    this.removeGoodsById(goods.goods_id)
	  }

	}
	
}
</script>

<style lang="scss">
.cart-container {
	padding-bottom: 50px;
}
.cart-title {
	display: flex;
	height: 40px;
	align-items: center;
	padding-left: 5px;
	border-bottom: 1px solid #efefef;
	
	.cart-title-text {
		font-size: 14px;
		margin-left: 10px;
	}
}
.address-border {
	display: block;
	width: 100%;
	height: 5px
}
.empty-cart {
	display: flex;
	flex-direction: column;
	align-items: center;
	padding-top: 150px;
	
	.empty-img {
		width: 90px;
		height: 90px;
	}
	
	.tip-text {
		font-size: 12px;
		color: grey;
		margin-top: 15px;
	}
}
</style>
